Questions tagged [240v]

For questions dealing with 240 volt electrical circuits, devices, and equipment.

2
votes
2answers
12k views

Size of circuit breakers for 220v circuit

I'm considering a piece of shop equipment with a motor that can be wired as 110-volt (20-amp) or 220-volt (10-amp). I'm leaning towards 220v despite the additional cost of installing the electrical ...
0
votes
5answers
10k views

Can I handle-tie two 120V breakers for a 240V load?

Due to an ordering error a long time ago, I have too many 30A 1-pole "CH" brand breakers. (these are single breakers, not tandem/double-stuff). As you probably realize, there isn't much call for ...
1
vote
0answers
669 views

change 110v outlet to 240v/30 amp?

I need to install a 240v/30 amp outlet for a microwave (a Turbochef, kind of like a microwave on steroids.) I have a single 110v outlet on its own circuit. It's using 10 awg copper. Can I replace ...
2
votes
1answer
209 views

Electrical - Please review my well pump installation

I just finished wiring up my irrigation well pump. The circuts were 240V from the main panel outside to the a pump start relay. The relay is controlled by my rain bird. Everything is working and no ...
0
votes
1answer
2k views

Can I install 2 30 amp twist lock receptacles in a 2 gang box on 1 circuit?

I have 10 AWG wire run to a 2 gang box (10-2 wire). It is 1 circuit protected by a double pole 30 amp breaker. Since it is 2-gang, can I use 2 30 amp twist lock receptacles (specifically the Hubbell ...
3
votes
1answer
4k views

Do both legs in 220V have to be switched?

I posted this question but for some reason I can't get back into my account: Is it up to code to do a parallel circut with 220V? Is there a limit to number of splices? Most things I see with 220V ...
1
vote
2answers
494 views

Is it up to code to do a parallel circut with 220V? Is there a limit to number of splices?

State is Florida. I am wiring a continuous run non-submersible irrigation well pump. I am using a 30A breaker with #10 THHN in Sch 40 PVC conduit buried 18". I could have gone direct bury but I ...
0
votes
4answers
696 views

How is a a two phase, three wire, grounding plug such as a NEMA 6-20P safe to use?

I'm looking to use a piece of commercial equipment in my home, and I've been reading about AC current and circuits. I currently have access to an old style non grounding 10-30 style plug, which I ...
1
vote
1answer
1k views

Changing a 240v plug with 4 wires to 240v plug 3 wires

I have a outlet that is 240V with 4 wires. I want to change it to 3 wires, I am assuming the black is also a hot wire. With the volt meter I get 220V touching the two red wires and 110V when i touch ...
1
vote
1answer
10k views

Adding GFCI to a 220v outlet

First off, please excuse my clunky use of electrical language. I'm not exactly sure what I'm talking about. I recently added a 220v/30amp outlet to my garage for the purpose of an electric ...
10
votes
4answers
7k views

3 phase (delta) power to single phase space heater

I bought a 240V single phase, space heater for heating up a warehouse space. The warehouse has 240V power in a delta configuration (no neutral). My understanding is that in a delta configuration, ...
2
votes
1answer
2k views

How can I build a subpanel off a 3 prong 220V dryer outlet?

I have an unused 220V, 3 prong (2-conductor) dryer outlet in my garage and would like to convert that into 2 110V supplies to some overhead lights and a ceiling outlet for a garage door opener. How do ...
2
votes
1answer
152 views

Run 3 Phase motor from 240V service?

I just bought an older Delta Table Saw with a 3 phase motor. I have 240 Volt service. How can I wire the motor, or what do I need to do to make it work?
0
votes
2answers
1k views

How to splice 220 line to use for multiple uses

I have a 50A 220v box outside for use during a power outage to feed the breaker box on both bars. Since this is very rarely used, i'd like to use it to install a 'dryer plug' for a new shop heater. ...
1
vote
1answer
100 views

I have a 30amp 240 breaker going to a 240v water pump. I want to protect each leg with a GFI

I have a 30amp, 240v circuit running to a 240v water pump. Can I add a 20amp GFI to each leg?
2
votes
1answer
2k views

Use 6-30 plug on 14-50 outlet

I am planning to install a NEMA 14-50 outlet in my garage on a 40A breaker (Romex 8/3 cable from breaker to outlet) for use with an electric car charger. The charger will charge my wife's car in the ...
2
votes
2answers
163 views

220v outlet safety question - Circuit breaker not tripped after a fire

An old oven (20+ years) plugged into an 220v 3-pronged outlet suddenly caught fire when we tried to use the oven a week ago. We replaced the appliance today but found that it would not power on when ...
3
votes
2answers
1k views

Electric Dryer Leg A drops to 0V Leg B spikes at 240V when start pushed

I am in the military and came back from a month overseas and my 3 prong electric dryer would not start. I am an electronics technician (radios) so I am quite experiences with electronics and theory (...
1
vote
1answer
605 views

Is my NEMA 14-30R to NEMA L6-30R adapter safe?

At our studio we have a NEMA 14-30R outlet used for our kiln. When not in use, we want to use another piece of equipment that has an L6-30P plug. I believe the equipment is rated at 8AMP 240V. I ...
1
vote
2answers
3k views

What could cause a 220v dryer outlet to have proper voltage but not power the dryer?

I bought a used washer and dryer about a month ago from a warehouse dealer that specializes in used appliances. The dryer worked for about a month then refused to operate. I called the appliance guy ...
1
vote
1answer
346 views

One cable, two circuits, 240V, Germany

I am remodeling my kitchen and the wiring that was ran for the cooktop/oven is shown in the included picture; 3 hot, 1 neutral, and a ground. Is it possible to split the 5 wires into two separate ...
1
vote
2answers
2k views

Is it possible to adapt a NEMA 14-50R to a NEMA 6-20P or NEMA 6-30P appliance?

In a Canadian residential kitchen, in a house built in the late 1970's, there is a NEMA 14-50R, on a 30 Amp breaker. Currently a standard oven/range combo is plugged into this receptacle. I would ...
1
vote
2answers
1k views

Can I have a clothes dryer and room heater on one circuit?

I currently have a 100 amp panel (square D) with no free slots. I'm looking at adding an electric heater (1000 watts, 240V) to the washroom. I'm wondering if I can replace the 30 amp breaker for the ...
0
votes
3answers
270 views

Can I safely create another 120V outlet using the fourth neutral wire from a 4 wire 240V line?

I recently just ran a 4 conductor 240 volt line out to my shed. I chose to run the extra conductor just in case, but I do not currently need it for my application. My question is, can I add a 120V ...
0
votes
2answers
202 views

220V/50hz with 10amp 3 wire

See Additional Added Info: I have an electric motor that I want to plug in at my house (USA). The device is 220V, 50hz and 600watt. The power cord (no plug) is 3 wires, and rated as 10amp. If I ...
2
votes
3answers
164 views

120 V between Ground and Neutral?

I had a new cooktop installed but it does not work. The unit replaced an old one and was simply plugged into the existing outlet. After checking the basics (no tripped breakers, etc), I whipped out ...
0
votes
5answers
19k views

240 volt house wiring, 130 volts on one leg and 112 volts on the other?

In my folks old farm house, at the panels main input from outside. L1 is 130v. L2 is 112v. When a load is applied both legs down voltage, allot! Anywhere from 10 to 20v. The wires running from the ...
2
votes
1answer
2k views

How to connect single-phase appliance to 240v feed?

I had a licensed electrician install this circuit with NEMA 14-30 receptacle before I knew which specific appliance would be used on the circuit. I now have the appliance with a 14-30 plug, but it ...
3
votes
3answers
592 views

Connecting the four terminals of a 14-50P to a homebrew 240v system with three wires

I bought a new 240v homebrew system. The system requires a 30 amp circuit and comes with 10 gauge wires (black, white, green) but no plug (so you can connect the plug needed for your situation). I ...
0
votes
1answer
907 views

Running a new 240v circuit for a dryer

I just bought a home with a gas hookup for the dryer, but I have a fairly recent, perfectly working electric dryer, so I've decided to run a 240v line instead of purchasing a new gas dryer. This is ...
0
votes
2answers
129 views

GFCI pops when the heater comes on

Just wired a new heater like this and the GFCI pops when the heater comes on. Can someone explain to me why this is happening?
0
votes
2answers
326 views

Confused by ~115VAC 5-wire cabling to UK thermostat

I have a 5-wire cable as used for 3-phase (i.e. stripes/blue/brown/black/grey) coming to a hole where a thermostat was - only the earth, live (brown), and switched live (black) were used by this ...
3
votes
5answers
2k views

Need another 240v breaker

I bought a device called Sense to monitor home electrical usage that is installed in your electrical panel. The device needs to be connected to a 240v breaker like this: The problem is that I only ...
3
votes
4answers
4k views

Looking for or adding a ground to an existing NEMA 10-30 socket

I have an unused older 3-wire dryer socket (NEMA 10-30R) in my garage, I would like to upgrade this to a NEMA 14-30 socket with an separate ground. I'll be using this for an EVSE unit for electrical ...
0
votes
1answer
348 views

Starting to build up my tools collection, is 110v preferable over 240v?

I am just starting out on my first major project this weekend and I am looking at getting some new tools. I've had experience using plenty of 240v power tools, but now that I am looking at getting my ...
5
votes
5answers
16k views

Hot Tub Disconnect Location

I have a concrete slab which can fit a hot tub approximately at a distance of 8 feet from the main breaker panel (located outside on my porch). I assume that I will still need a separate disconnect ...
1
vote
1answer
535 views

Can I use a transformer with center tap to convert 240V to 120v? [closed]

I want to buy a 500W RMS surround system from the US and it is 120VAC. I'm planning to use a transformer here but I'm not sure what is the size/specs of the transformer to use or will it going to ...
1
vote
3answers
111 views

Can I run these appliances with 25A

I'm looking to lease a floor of a building for office purposes but the building owner has placed a cap on current to 25Amp due to limited current available. I'm no expert but he has consulted a ...
1
vote
2answers
389 views

Changing 240V plug type

I have a device (a popcorn popper) that has an L14-20P plug. I would like to use it with my stove's 14-50R receptacle. Since the device is rated for 20 Amp, and the receptacle for 50, this should be ...
4
votes
2answers
8k views

How is ground wire handled on 240V outlet?

I'm in the process of moving 240V outlet. The outlet has three wires connected. See the image: In the junction box I can see the ground coming out of the outlet. See the image: So where is the ...
1
vote
1answer
623 views

240V power plug, only getting 120v, and 97v?

This is the plug/socket: Between one line and neutral, I get 120v. Between the other line and neutral, I get nothing. However, when I go between the line and the line, I get 97 volts. (I'm testing ...
5
votes
2answers
22k views

Replacing 240V outlet with 120V

I just moved into a new home, and we have an outlet in the bathroom that was set up for a washer/dryer in case we wanted to go that route. The outlet is a NEMA 10-30R. We are happy with the dryer ...
0
votes
1answer
2k views

How can I tell if two outlets are on different phases?

I have a house that had a 240v stove in it, and then was replaced with a gas stove, all before I bought it. There are two regular 120v outlets under it, that are both 120v, and the gas stove is ...
6
votes
1answer
14k views

Installing a new 240v receptacle - what do I need to know?

Provided I use a box large enough to meet the fill requirements (and use 10 AWG conductors), are there any additional requirements I should be aware of when installing a new 240v 30 amp receptacle for ...
1
vote
1answer
13k views

How can I make a 240 volt 4 wire to 3 wire extension/adapter cord?

I have an existing 240 outlet wired into the wall of my shop. It's there to run a phase converter that I use about 2 hours a week. I want to use this circuit to run a 240 window air conditioner when ...
0
votes
2answers
85 views

240 outlet giving abnormal me abnormal readings

I just moved to a new house and was troubleshooting a dryer when I noticed my outlet is giving me incorrect voltage. I know I should have two hots (A and B) on either side, a ground at the top (C) and ...
1
vote
2answers
18k views

240v outlet not delivering 240 volts

To spare you all the long version of my two week nightmare: bought a house built in 1976. Hooked up dryer, switched to 3 prong plug. Dryer ran fine, started to smell like burning plastic until it ...
1
vote
1answer
630 views

Sauna tripping GFCI

I've just finished up wiring an old heater in my sauna. It has laid around in a shed for a decade or so and am wondering if it's spent. It powered on fine and heated for about 5 minutes until the GFCI ...
0
votes
1answer
913 views

Wiring a Sauna heater

I was wondering about the correct way to wire a 240V sauna heater/thermostat in a sauna I have built. From the heater I have a black, white, and bare wire. The black and white connect to separate ...
3
votes
2answers
2k views

How do I wire this 240v fan motor and thermostat

I'm trying to wire a two stage exhaust fan for my greenhouse. The motor comes set up for 240v wiring and is to be controlled by a thermostat. I undertsand how to get the 240v from the panel, but can't ...